Answer is (4) - Pb.
According to the reactivity series of elements
- the elements which are above the hydrogen are more reactive than hydrogen.
- the elements which are below the hydrogen are less reactive than hydrogen.
Among the given choices, only Pb is placed above the hydrogen in the reactivity series and rest are below the hydrogen.
Hence, Pb is more active than hydrogen.
Explanation:
Formula to calculate the atomic packing factor is as follows.
APF =
=
It is given that atomic radius is 0.123 nm and density of metal is 7.45 .
Hence, number of atoms will be calculated as follows.
No. of atoms = = 4
APF =
= 1.3905
Thus, we can conclude that atomic packing factor if the unit cell has a tetragonal symmetry is 1.3905.
Answer:
1.17 L
Explanation:
Step 1: Given data
- Initial volume (V₁): 1.50 L
- Initial pressure (P₁): 1.10 atm
- Initial temperature (T₁): 25 °C
- Final pressure (P₂): 1.50 atm
- Final temperature (T₂): 45 °C
Step 2: Convert the temperatures to the Kelvin scale
We will use the following expression.
K = °C + 273.15
K = 25°C + 273.15 = 298 K
K = 45°C + 273.15 = 318 K
Step 3: Calculate the final volume of the neon gas
If we assume ideal behavior, we can calculate the final volume of the neon gas using the combined gas law.
P₁ × V₁ / T₁ = P₂ × V₂ / T₂
V₂ = P₁ × V₁ × T₂ / T₁ × P₂
V₂ = 1.10 atm × 1.50 L × 318 K / 298 K × 1.50 atm = 1.17 L
Answer:
hello, the answer is polygenic:)
Answer:
No
Explanation:
Since clear is the absence of color, it cannot be classified as a color.